Core plug



' April 1940- w. BEIBIE 2,196,378

7 CORE PLUCT Filed April 5, 1938 ATTORNEY.

Patented Apr. 9, 1940.

7 2,196,378 GORE PLUG Edwin W. Bebie, Hawthorne, N. J.,

assignor to International Paper Company, a corporation of New York Application April 5, 1938, Serial No. 200,115

2 Claims.

My present invention relates to plugs of the typle adapted to be inserted in the cores of paper r0 5.

It is an object of my invention to provide a core plug of the type described which shall be very strong and which will afford a maximum of protection for the cores of paper rolls.

It is a further object of my invention to provide a core plug of the type described having reeniorcing means formed therein in such a manner as to impart great rigidity thereto.

It is a further object of my invention to provide a core plug of the type described which includes means for firmly securing the plug in position within the core of a paper roll.

It is a further object of my invention to provide a core plug according to the objects above enumerated and having an opening defined therein'to facilitate removal of the plug from the core of a paper roll.

A further object is to provide a core plug fulfilling the above objects and which shall be extremely economical of manufacture.

Other and further objects of my invention will become more apparent from a consideration of the following description of one form of the invention taken in connection with the drawing accompanying and forming a part of this specification.

In the drawing,

Fig. 1 is an elevational view showing one face of a core plug embodying this invention;

Fig. 2 is an elevational view of face of the core plug shown in Fig. 1 and showing the same in position within the core of a paper roll;

Fig. 3 is a section taken alongthe line 3-3 of Fig. 2; and

Fig. 4 is an elevational view similar to Fig. l and showing a modification of my invention.

Similar characters of reference indicate similar parts throughout the several views.

Referring now to the drawing, Ill indicates the core of a paper roll. The core I0 is of conventional structure and may be formed oi paper or other fibrous material. It will be understood that paper will be wound upon the core It! for the formation of a roll of any desired size and weight. Such rolls of paper are subjected to rough handling in transportation and within manufacturing and printing plants. It is essential that the core Ill be maintained in cylindrical form irrespective of the handling to which it may be subjected and it is further essential the opposite that the ends of the core shall be protected against damage from any source.

" According to my invention, 1 provide a core plug ll comprising a cylindrical body portion 12 adapted for insertion within the ends of the core Ill. The body-portion I2 terminates at its outer end in a flange l3 which serves to protect the end of the core 10 and which further serves to limit the extent to which the plug ii may be inserted within the core. The inner end of the cylindrical body 12 is preferably rounded or tapered inwardly and merges into an integrally formed, web portion it which serves to close the inner end of the cylindrical body l2.

In order to rigidify the structure thus far described and in order to insure firm inter-engagement between the core plug it and the core III, I .providejthe plug with intersecting ribs which may be struck into the body thereof. By reference to the drawing, it may be seen that ribs l5 and I6 are struck within the web portion I l. The ribs l5 and 16 are preferably relatively angularly'disposed and intersect within the web M. The intersecting ribs 15 and It thus serve to rigidify the web I4 along angularly intersecting axes.

The ribs l5 and I6 are continued over the rounded intersection between the cylindrical body l2 and the web M to form core engaging ribs l1, l8 and I9, 20 respectively, which protrude outwardly from the cylindrical body l2 and which extend longitudinally thereof. The cylindrical body I2 is preferably of a diameter substantially equal to the inner diameter of the core Ill. The core engaging ribs [1, l8 and ill, at will therefore be adapted to embed themselves within the fibrous body of the core Ill when the plug is positioned therein as shown in Fig. 3., The provision of the core engaging ribs just described insures firm engagement between the plug and the core and will prevent accidental dislodgment of the plug therefrom irrespective of slight variations and irregularities which may occur in the core.

The ribs l5 and I6 and their extensions ll, l8, l9 and 20 are generally channel shaped in cross section and hence serve to impart great rigidity to the core plug and serve to offer great resistance to distortion of the core II! as a result of severe blows or other rough handling to which a paper roll may be subjected. As shown in the drawing,

the ribs l5, l6 intersect at substantially right angles and approximately at the center of the circular web portion l4. Such disposition of the ribs l5 and I6 is desirable in that they serve to rigidify the web l4 along vertically intersecting axes and thus ofler maximum resistance against distortion of the web. However, it will be understood that any desirable number of ribs similar to the ribs l5 and 16 may be employed and that such ribs may intersect at any desirable angle and at any desirable point within the web I4.

While I have shown the Web portion M to be substantially flat, it will be obvious that the contour thereof may be varied without departing from the scope of my invention. For example, the web M may be curved either convexly or concavely or may be formed as a truncated cone. In any such variation of structural form, the continuous, unbroken stiffening ribs provided in accordance with my invention will serve to rigidify the web for the purpose herein set forth.

The core plug I i may be provided with a finger hole 2| formed in the web M. The finger hole 2| is preferably located in a position removed from the point of intersection of the ribs l5 and i6 and is preferably so formed that it will not extend into or otherwise weaken the ribs 85 and I6. The hole 2| may be availed of for removal of the plug from the core I E] and may permit the insertion of a rod or spindle to assist in moving the paper roll.

In Fig. 4, I have shown a modification of my core plug H in which the finger hole has not been completely out out of the web i4. As shown in this figure, the finger hole is defined by a series or" curved slits 22 separated by small webs 23. This construction leaves a disk-like portion 24 which may be readily separated from the web 14 by a sharp blow. In the form of my invention shown in Fig. i, the disk 2 may remain in the core plug during shipment and handling of the paper roll and may be knocked out to provide a finger hole when it is desired to remove the plug from the paper roll.

It will thus be seen that I have provided a core plug attaining the objects of my invention. My improved core plug may be conveniently and economically formed from sheet metal in a single stamping operation.

While the above detailed description of preferred embodiments of my invention have been made in order to comply with the patent statutes, it is obvious that modifications and variations may be resorted to by those skilled in the art. It is, therefore, my intention that the above description shall be taken in an illustrative rather than in a limiting sense and that the scope of my invention shall be limited only by the appended claims.

I claim:

1. A core plug for paper rolls comprising a cylindrical core-engaging body, a fiange extending outwardly from one end of said body, said body being closed at its opposite end by a web formed integrally with said body, and a plurality of ribs formed in said web to stiffen the same along intersecting axes, said ribs. extending continuously across the face of said web and into said cylindrical body to form longitudinally-extending outwardly-projecting core-engaging ribs in said cylindrical body.

2. A core plug for paper rolls comprising a cylindrical core-engaging body, a flange extending outwardly from one end of said body, said body being, closed at its opposite end by a web formed integrally with said body, a plurality of angularly intersecting stiffening ribs formed in said web, and said web having a portion thereof partially cut away whereby said portion may be easily removed to form a finger hole in said web.

EDWIN W. BEBIE. 

